My company utilizes a traditional mpls infrastructure where all remote locations go through our main data center to get to the internet. We have century link as our provider & if remote locations need to communicate with each other century link has a full mesh in the cloud so that remote site to remote site traffic doesn't need to hair pin to our data center. In theory its a direct connection. My question this...
Some of our sites have 2 century link circuits going into 2 of our CPE routers. At those sites we may have a routemap/prepend statement applied to our century link BGP neighbor on only one circuit so that traffic going to those sites get evenly load balanced across both circuits. I am looking at one configuration in particular where we are prepending our own local AS number on a local subnet 3 times in the outbound direction. But the problem is when I look at our main data center mpls router I do not see that subnet with a longer AS path. I am also looking on the routers at other remote sites & do not see an AS path for the subnet in question that is longer than 2 AS's. I also looked at other prependings & I don't see longer paths for those subnets either. Is the century link neighbor router the only router that would see this? Is this normal? Am I missing something?
